The problem you describe is probably with the browser on your computer. There can be several reasons: problem with cache, a pop-up blocker, Flash add-on disabled or corrupted Flash S/W. This happens from time to time. Here is a list of steps you can take to fix it:

By the way, if you want to be sure the problem is with your browser, you can try using a different computer or a different browser on the same computer. You will most likely see everything is working well.